I bought one of these. And hooked up 4 2TB drives and attached it to my new Mini. The Mini kept crashing and freezing causing me to have to repeatedly manually force quit the Mini with its power button. When I restarted with the drives just daisy-chained to each other there were no crashing/freezing problems. I had a DVD burner daisy-chained to one of the drives because it's only 400. Also, the hub was extremely hot after just a short time (an hour or so) using it. Is this typical of these Granite FireWire hubs or did I get a dud?